This event takes place in Boulder, Colorado. The extremely fast course provides personal records for many, even our local professional field. Boulder, Colorado was founded in 1858, featuring the renowned Red Rocks amphitheater and Chautauqua, an unparalleled hiking, music, and picnic destination. From vineyards and breweries to shopping and mountain climbing, there are activities for everyone.

If the event is not sold-out online, we will take walk-up registrations during athlete check-in hours on a first-come, first-served basis. Please check the Registration tab on the website for information on standard entry fees. An additional $25.00 walk-up fee will be charged, along with any applicable Active processing fees. We only accept credit cards for payment. Please note, as a walk-up registrant you are not guaranteed your desired T-shirt size. You will not be able to pick up your T-shirt until the last hour of Athlete Check-In on the second day, no exceptions. Please check the Event Schedule for Athlete Check-In dates and times.

All qualifying events will implement both the International Triathlon Federation and USA Triathlon’s Age Group Competition rule: All age group athletes must compete in the age group division corresponding to the athlete’s age on December 31st of the year of the event.

Individuals may transfer to a Relay entry (upon availability) and pay the price difference. Since we are unable to make this swap in our registration center, we will need you to re-register under the Relay Captain Category and create a team name and password. Once this is complete, please email and we can fully refund your individual entry fee.

You must declare your status and race in that division. Professionals must hold a valid professional/elite card or a letter from their country’s federation. For more information on IRONMAN pro membership, please log onto www.ironmanpromembership.com.

Prior to race day, at least one slot shall be tentatively allocated to each Age Group category (both male and female). Please see the official Age Group category breakdown listed below.

Final slot allocation will be determined on race day based on the number of official starters. If there are no starters in a particular Age Group, then that slot will be moved to the next calculated Age Group within the gender.

Final slot allocation shall be representative of the actual number of Age Group starters in each category in the race. For example, if 8% of the Age Group starters are Female 40-44, then 8% of the slots are allocated to the Female 40-44 category.

Athletes MUST claim their slot in-person during the designated registration period for the world championship. Please check the Schedule of Events for more information.

1. In accordance with the World Triathlon Corporation Anti -Doping Policy, all athletes accepting qualifying slots for the IRONMAN World Championship and IRONMAN 70.3 World Championship will be required to sign a condition of Entry, Release and Indemnification waiver, by which they agree to be placed into the WTC Registered Testing Pool for both in and out of competition testing, and voluntarily consent to be governed by the published rule.

2. We encourage all athletes to be familiar with the most current WADA Prohibited list which can be foundhere.
3. According to the World Anti-Doping Agency and the 2010 International Standard for Therapeutic Use Exemptions, there are some substances which require a Declaration of Use. The WTC recommends completing this in two ways:
a) Filing a Declaration of Use directly to your NADO or through your secured ADAMS login The WTC Declaration of Use form can be found here.
b) On the Doping Control Official Record at the time of testing should you be selected for Doping Control The substances which require a Declaration of Use are listed below:
i) Albuterol and Salmeterol by inhalation for the treatment of asthma
ii) Inhaled or locally injected glucocorticosteroids (intramuscular use requires a TUE)
iii) Platelet Rich Plasma injections (except intramuscular which requires a TUE)

USA Triathlon will sanction the race. To complete the online registration process, athletes will need to enter their USAT annual license number or purchase a one-day license ($12.00 USD) during online registration. Athletes must bring their photo identification and show proof of current USAT membership during Athlete Check-In. If you cannot produce the above mentioned, you will be required to purchase a one-day license on-site. Please visithttp://www.usatriathlon.org/ for a complete set of the competitive rules.

At the conclusion of on site registration for the automatic qualifiers, any unclaimed slots within an Age Group will be rolled down to the next eligible finisher within that Age Group.

If an athlete chooses not to take the slot, does not attend the rolldown ceremony or has already qualified, the next eligible finisher in that Age Group may claim the qualifying slot.

Following rolldown, any unclaimed slots within an Age Group will be reallocated to another Age Group within the gender based on the athletes-to-slots ratio.

The Age Group within the gender with the largest athletes-to-slots ratio will receive the first reallocated slot, followed by the next largest ratio receiving the second re-allocated slot (if applicable), and so on.

Wetsuits are permitted if the water temperature is up to (and including) 76.1 degrees Fahrenheit (24.5 degrees Celsius) or colder.

Wetsuits will be prohibited in water temperatures greater than 83.8 degrees Fahrenheit (28.8 degrees Celsius).

Athletes who choose to wear a wetsuit in water temperatures 76.2 degrees Farhrenheit (24.55 degrees Celsius) and up to 83.8 degrees Fahrenheit (28.77 degrees Celsius) will not be eligible for Age Group awards, including World Championship or Rolldown slots.

Full wetsuits are permitted (arms and legs covered).

The De Soto Water Rover and the Speedo Elite Triathlon Wetsuit with forearm flaps wetsuits are PROHIBITED

Athletes should contact the wetsuit manufacturer directly to confirm whether their suit is legal

Race Officials will be monitoring athletes on race morning to enforce wetsuit restrictions.

Swimwear (Skinsuits/Speedsuits) must be 100% textile material, which is defined as materials consisting of natural and/or synthetic, individual and non-consolidated yarns used to constitute a fabric by weaving, knitting and/or braiding. Simply put, this would generally refer to suits made only from nylon or Lycra that do not have any rubberized material such as polyurethane or neoprene. Swimwear must not cover the neck, extend past the shoulder, nor extend past the knees. Swimwear may contain a zipper. A race kit may be worn underneath swimwear.

No. Compression wear is considered illegal equipment in non-wetsuit swims. This includes compression sleeves, compression socks, or compression tights. Any compression wear that extends past the shoulder or knees will not be permitted in non-wetsuit swims.

Swim goggles and facemasks may be worn. Athletes who choose to wear a snorkel must submit a request to the event’s Head Referee prior to competition, or risk disquali­fication. Any athlete that is approved to use a snorkel will not be eligible for Age Group Awards, including 70.3 World Championship slots or Rolldown slots.

Swim: Each wave will have 1:10 to complete the swim. Athletes who take longer than 1:10 to complete the swim will receive a DNF. Additionally, any athlete that starts in the final wave and misses the 1:10 cut off will not be allowed to continue on in the race and will receive a DNF.

Bike: 5 hours and 30 minutes after the final wave start.

Run: 8 hours and 30 minutes after the final wave start.

Total Time Cut-off: The race will officially end 8 hours and 30 minutes after the final wave. Each athlete will have 8 hours and 30 minutes to complete the race. Any athlete that takes longer than 8 hours and 30 minutes to complete the race will receive a DNF and will not be eligible for age group awards and will not be eligible for IRONMAN 70.3 World Championship slots. Additionally, athletes that are in an earlier wave and finish before the final course cut-off but take longer than 8 hours and 30 minutes to complete the race will receive a DNF and will not be eligible for age group awards and will not be eligible for IRONMAN 70.3 World Championship slots.

Relays: The race will officially end 8 hours and 30 minutes after the final wave. Each athlete and relay team will have 8 hours and 30 minutes to complete the race. Any athlete or relay team that takes longer than 8 hours and 30 minutes to complete the race will receive a DNF and will not be eligible for awards and will not be eligible for IRONMAN 70.3 World Championship Slots.

Yes, during the event there will be live race day coverage including athlete tracking and up-to-date race results. The tracking is ONLY available on race day. You can go to ironman.comand click on ‘Live Coverage’ at the top of the page and select the correct race. Select ‘Athlete Tracker’ and you can search by bib number or last name.

The Medical Tent is highly congested and spectators will not be allowed in. There will be a Medical Information Tent next to the Medical Tent where medical updates will be available on athletes who enter the Medical Tent.

Unfortunately, due to high congestion in the finish line area, spectators without the proper designation AND an IRONMAN staff escort are not permitted. Please do not try to gain access to this area, as it must remain clear for the safety of the athletes. Before the event, you and your athlete should decide on a meeting place for after they have finished.

For VIP opportunities to medal your athlete at the finish, please Click Here for information on our IRONMAN VIP Services!

Friends and/or family members are not permitted to cross the finish line or enter the finish chute with participating athletes. This policy allows each competitor adequate time to celebrate their accomplishment without interfering with other finishers and ensure the safety of all participants, volunteers and fans. Athletes who choose not to respect the policy will receive an automatic disqualification (DQ).

No, for safety reasons we ask that you do not attempt to follow your athlete by car. The best place to watch your athlete is in the transition area and the finish line. Any vehicular traffic on the race course should expect long delays. Please do not attempt to gain access to the race course with your vehicle. We want to keep the course as safe as possible for the athletes.

The IRONMAN Village features various booths- including a showcase of official IRONMAN Merchandise, IRONMAN exhibitors, bike shops, as well as many other services and products. It provides a perfect gathering and meeting place for athletes and spectators.